Checkmk Werk 13047: RESTAPI: fix agent information and agent download

ID: 13047 Title: RESTAPI: fix agent information and agent download Component: Core & setup Level: 1 Class: Bug fix Version: 2.1.0i1 Before this Werk, both endpoints for downloading the agent binary and for getting the configuration of a agent shared the same URL, so effectively only the "show agent information" endpoint to show the configuration was active. This endpoint did not work properly and returned an error: <tt>AttributeError: 'str' object has no attribute 'items'</tt> With this Werk a second endpoint was introduced to download the agent binary and the endpoint to show the agent configuration was fixed.